Automatic weft-bobbin-exchanging device for looms.



A. G. KOEGHLIN. AUTOMATIC WEFT BOBBIN EXGHANGING DEVICE FOR LOOMS.

APPLICATION FILED NOV. 1, 1911.

Patented Oct. 7, 1913.

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MENTS, TO'DRAPER COMPANY, OF I-IOPEDALE, MASSACHUSETTS, A CORPORATIOi I 0F MAINE.

AUTOMATIC WEFT-BOBBIN-EXCHANGING DEVICE FOR LOOMS.

Specification of Letters Patent Patented Oct. "7, 1913.

Application filed November 1, 1911. Serial No. 657,996.

my United States Letters-Patentapplication Ser. No. 652954, filed October 5,1911. In.

this application an improvement was described as applied to automatic weft bobbin exchanging devices for looms in which the weft spool or bobbin magazine generally consisted of a casing or box without any movable inner partition wall, which was provided with a retaining wedge-shaped member placed on the inner side of the casing near the lower bobbin e'xitvopeningi for the purpose of allowing the single bobbins to pass more easily through the opening and to separate the layers of bobbins one from the other. Also the floor of the casing was provided with a guide for'the bobbins of the lowest layer, a transferring guide channel being arranged contiguous to the bobbin exit opening of the casing-and lying It has now inner retaining wedge-shaped member of the bobbin magazine may be replaced by outer movable retainin so arranged with regar to the bobbin exit opening of the casing and the said tran sferring guide channel and areso limited in their outward movement that they only allow one row of bobbinsto slide on to the transferring guide channel under the pressure of the supply of bobbins stored in the magazine at the same time holding backthe other bobbins. In this arrangement the inside of the bobbin magazine itself is of extreme-simplicity. and also the transferring guide channel need not be arranged lower than the floor of the magazine where it joins the latter at thesbobbin exit opening.

The retaining mea'nspreferably consist of twomovably (pendulum or slidable) arranged retaining members which eachh'ct as a retaining stop for the second and'tl'i'iid lowest row of bobbins and are controlled means which are.

by weight or spring action so that-they are unable to pass beyond a predetermined grid position under the pressure of the bobins. sist'of a single niovably arranged retaining member the outside position of which is limltedby an adjustable stop. Any suitable retaining members such as pivoted flaps, loops, Weight rollers or the like, slidably mounted pressure members or the like may be used,

Three constructionsof the apparatus according to the present invention are illustrated on the accompanying which: v,

Figure 1 is a sectional elevation of the preferred construction. Fig. 2 is a sectional elevation of a second 'construction -Figs.

3 and 4 are detail" views of the third constructional form.

In the drawings, a is the magazine chamher for receiving a plurality of superposed layers of weft spools, orbobbins, having the form of a box without any inner partition wall, which is provided at its front side with a lower bobbin exit opening I) and has a guide rail d arranged on the slightly inclined base of thebox for the guiding of the bobbins of the lowest row of bobbins lying within it. A bobbin transferring guide channel f is directly contiguous to the opening 7) and conveys the bobbins one after 'the other directly to the usual transferrer g.

In Fig. 1 two retaining flaps i and '2' are hung on the outside of the-bobbin casing a in the manner of pendulums and; owing to their unequal length in their normal .posi

tion, 'form retaining stops for the second and third lowest row of bobbins, while they leave free the lowermost row of bobbins, thus allowing the latter to pass on to the transferring guide channel f. Owing to their own weight they take up the normal drawing, in

position shown in the drawings and their weight is so calculated that their outward oscillating movement is limited only by the action of gravity, without any special stops, although in some cases additional sto means may also be employed. 4 Should or any .reason the inner shorter flap 2' be pressed out of its normal position owing to the pressure of the bobbins in the magazine chamber, then it will finally abut against the outer flap 5* and then the pressure of the bobbins will bined weight action of both flaps.

In the constructional form according to Fig. 2 instead of two flaps being arranged pivotally about the same axis, two Weight rollers m, m are freely suspended from two different axes and form in the like manner retaining stops for the second and third lowest row of bobbins. \(III the construc tional form shown in Figs. 3 and 4 a single suspended retaining flap n is used, the outer limit position which it' can take up under excessive bobbin pressure in the magazine being limited by an adjustable sto 0. The latter consists of a set screw provi ed with a; conically sha ed projecting head so that the outer limit to Which the flap can move may be ad 'usted by screwing in or out this stop a. hen the stop 0 is completely screwed out the flap n is free.

What I'claim is:

1. In an automatic weft bobbin exchanging device for looms of the kind above referred to, the arrangement of a bobbin magazine in form of a substantially rectangular boxwithout any inner partition wall for receiving a plurality of superposed layers of bobbins, said box having a slightly inclined base with a guide-rail thereon for the bobbins of the lowest layer and being provided with a lower bobbin exit open-' mg, a movable transferrer for transferring the bobbins into the working shuttle, a

guide-channel for conveying the bobbins from the box directly to sald transferrer, and a movable retaining device outside the 1 box for: retaining the superposed bobbin layers'with the exception of the lowest one which is entirely free to pass onto the transferring guide-channel under the pressure of the supply offbobbins in the magazine,-

substantially as described.

2.?In an automatic weft bobbin exchanging device for looms'of the kind above referred to, the arrangement of a bobbin magazine in form of a box without any inner shuttle, a

partition wall for receiving a plurality bobbins from the -box directly to said transide--' '50, layer and being-provided with a lower bob,-

'bin exit opening, a movable transferrepfor transferring the bobbins into the working I guide-channel for conveying the '55 ferrer, and two movable"- retaining members outside the box so arranged wrth'regard to; said opening andguide-channel a's to'form.

a stop respectively for'the s'e iidra-nd tlliidf lowest, row of bobbins of it e supply of bobbins, while they leave free-the'lowenmost' row of bobbins, substantially as described,

3. In an automatic weftbobbin exchange ing device for looms of thekind aboye referred ,to, .the-gar'rangement of afb'obbm magazine-inform of a box without any inner i partition wall for receiving; a v plurality of superposed layers of bobbins, said boxzhalv ing a slightly inclined base 'witna gulde-nnl thereon, for the bobbins of 'fth'e lo west layer and being pioyid'ed with a lower bobbinexit opening,

two hinged retaining member's outsidethe" a movable traii'sferrerv for trans ferrin' the bobbins into th'e'workin'g shuttle, 4

5 -channel for conveying the bobbins I box, of difi'erent operative length and ofgfi'ch a weight as to be limited lnth'eir outvva'alrii.v

oscillating movement, said retaining niembers constitutinga stop respectivelyforthe second and third lowest row of bobbinsgofj the supply of bobbins While leaving .free the lowermost row of bobbins, substantially as described. Inwitness whereof I have hereunto signed Witnesses:

GEO. GIFFORD, AMAND BRAUN; g

- .85 my name this 21st day of October, '1-91l, in A r 

